Flame retardant treating agents, flame retardant treating process and flame retardant treated fibers

Abstract

The flame retardant treating agent of the invention comprises a phosphorus-based compound represented by the following formula (4), for example. According to the invention, a polyester fiber woven fabric is immersed in a treatment solution containing the flame retardant treating agent and is heat treated at a prescribed temperature in order to fix the flame retardant treating agent to the polyester fiber woven fabric to obtain flame retardant treated fiber. As a result, it is possible to maintain adequate fiber cleaning durability and achieve a sufficient flame retardant property even by post-treatment, without using halogen-based compounds.

The invention claimed is: 
     
       1. A flame retardant treating agent for post-treatment of fibers comprising a dispersion stabilizer and at least one of the following:
 a first phosphorus-based compound represented by the following formula (1):                  
 
 
       where R 1  represents a hydroxyalkyl or a substituted or unsubstituted aralkyl group, or a group represented by the following formula (2):                  
 
       where R 2  represents an alkyl group of 1–10 carbons,
 and a second phosphorus-based compound represented by the following formula (3):                  
 
 
       where R 3  represents a substituted or unsubstituted aralkyl group. 
     
     
       2. A flame retardant treating process comprising
 treating a fiber with a flame retardant treating agent according to  claim 1 , and heat treating the fiber treated with the flame retardant treating agent. 
 
     
     
       3. The flame retardant treating process of  claim 2 , including heat treating the fiber to a temperature in the range of 100–220° C. to fix the flame retardant treating agent to the fiber. 
     
     
       4. The flame retardant treating process of  claim 2 , including
 immersing the fiber in a treatment solution containing the flame retardant treating agent, and heating the treatment solution to a temperature in the range of 90–150° C. to fix the flame retardant treating agent to the fiber. 
 
     
     
       5. The flame retardant treating process of  claim 2 , including immersing the fiber in a treatment solution containing the flame retardant treating agent and a carrier , and heating the treatment solution to a temperature in the range of 80–130° C. to fix the flame retardant treating agent to the fiber. 
     
     
       6. A flame retardant treated fiber comprising a fiber to which is fixed a dispersion stabilizer and at least one of the following:
 a first phosphorus-based compound represented by the following formula (1):                  
 
 
       where R 1  represents a hydroxyalkyl or a substituted or unsubstituted aralkyl group, or a group represented by the following formula (2):                  
 
       where R 2  represents an alkyl group of 1–10 carbons,
 and a second phosphorus-based compound represented by the following formula (3):                  
 
 
       where R 3  represents a substituted or unsubstituted aralkyl group. 
     
     
       7. A flame retardant treated fiber produced by the flame retardant treating process of  claim 2 .